Steam-generator



(No Model.)

W. T. EASTMAN.

STEAM GENERATOR.

No. 340,106. Patented Apr. 20, 1886.

UNITED STATES PATENT O FFICE.

WESTON T. EASTMAN, OF ROOKLAND, ASSIGNOR OF ONE-HALF TO ALBERT F. KELLEY, OF CAMBRIDGEPORT, MASSACHUSETTS.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 340.106, dated April 20, 1886. Application filed July 27, 1885. Serial No. 172,701. (No model.)

To all whom it may concern:

Be it known that I, WEs'roN T. EASTMAN, of Rockland, county of Plymouth, State of Massachusetts, haveinvented an Improvement in Steam-Generators, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

My invention relates to steam-generators es pecially intended for heating buildings, and the object of the invention is to produce a generator of simple and inexpensive construction and economical in regard to fuel. The water-space in the generator exposed to the action of the fire and products of combustion is composed, mainly, of wrought-iron pipes joined by threaded fittings, and the masonry is provided with partitions, forming fines-or passages in which the products of combustion circulate around the pipes containing the wa' ter. The fuel is supported on a grate composed of grate-bars, and the said pipes placed alternately, the latter also surrounding the fire-chamber, so that the heated fuel is in direct contact with the pipes at all points.

Figure l is alongitudinal section of a steamgenerator embodying this invention; Fig. 2, a transverse vertical section thereof; and Fig. 3 a plan view of the grate, the remaining portion of the generator being in section or removed.

The steam-generator is inclosed in a structure composed of masonry, thefront wall, a, of which is provided with a door, I), for the introduction of fuel to the lire-chamber, and a door, 0, leading to the aslrpit, as usual. At the rear of the front wall, a, there is a waterchamber, (2, preferably of cast-iron, lining the front of the fire chamber or furnace, the said chamber d having an opening indicated by dotted lines, Fig. 1, corresponding to the door I), through which fuel is introduced. From the lower portion of said chamber (1 is extended a series of pipes, 9, supported on a wall, It, at the rear of the ash-pit,and by the cross piece 8, built into the side walls, f, of the masonry, the said pipes supporting the bridge-wall i at the rear of the fire-chamber. The said pipes g constitute a portion of the grate upon which the fuel is supported, and grate-bars g, lying parallel with the pipes g, and arranged alternately therewith, forming the remaining portion, the said grate-bars resting upon the bridge-wall h and the cross-piece 0. At the rear of the bridgewall 1' the said pipes g are connected by T-fittings k with a series of substantially vertical pipes, m, connected by elbow fittings with substantially horizontal pipes n, leading to the chamber (Z above the fire-chamber. The chamber (l also has connected with it at each side pipes 0, extending along the inside of the side walls, f, of the masonry, vertically above one another and connected by elbows with pipes 0, extending along the front of the bridgewall i, the said pipes o 0 thus surrounding three sides of the fire-chamber and constituting a. basket or vertical grate for the fuel.

The pipes at enter a water-inlet chamber, 9, at the rear of the bridge-wall and wall h, and the said chamberp is connected with the chamher (1 by a series of pipes, r, substantially parallel with the pipes at n, the said pipes or, n, and r being arranged in rows and set staggering, as shown in Fig. 2.

A partition, 2, is provided a short distance in front of the rear wall, a, of the masonry, and from the top of the said partition a plate,

1), extends to the front wall, a, of the masonry, the said plate 0 'lbrming the top of the combustion-chamber. g

The partition 6 is provided near its lowest end with a flue or passa e, 1', containing a damper, t operated by a suitable handle, 25", outside the masonry.

Above the plate or partition o,and below the top portion, '20, of the masonry, is a space containing the water and steam chamber 1 from which the steam isled by asteam-pipe, y. The said chamber 3 is connected by a pipe, y/flwith the upper portion of the chamber (1, and by a pipe, 3/, with the pipe 3 for feed-water or returned water of condensation, the said pipe leading to the chamber 1).

The course of'the products of combustion is clearly shown by the arrows, they passing over 9 5 the bridge-wall and surrounding the pipes m,

a, and r; then down between the bridge-wall and partition t,around the chamber 1;, through flue t, and upward between the partition t and rear wall, a,

of the masonry; thence through of the chamber d through the pipe y, the water moving from the cooler to the hottest portions of the steam-generator.

The entire steam-generator is preferably set in a slightly-inclined position, as best shown in Fig. 1, the pipe y entering the chamber y at a somewhat lower level than the pipe 31 so that when no feed-water is entering the generator from the outside the circulation will be maintained, the cooler water passing from the chamber y through the pipe y and feed-pipe 3 into the water-inlet chamber 19, and the hotter water entering the chamber y through the pipe 3 I claim- 1. In asteam-generator, a fire-chamber and a water-chamber or casting at thefront thereof, combined with a bridge-wall and water-inlet chamber atthe rear of the said bridge-wall, the return-pipe y, and a number of pipes extending from the water-chamber at the front of the fire-chamberrearward over the said firechamber and then downward at the rear of the bridge-wall to the water-inlet chamber, substantially as described.

2. The fire-chamber, and ash-pit, and partition and bridge walls at the rear thereof, combined with a rearwardly-extending partition above the fire -chamber and a substantially vertical partition at the rear of the bridge-wall provided with a flue or passage in its lower end,and with a water and steam chamber above the partition over the fire-chamber, and pipes below the said partition and at the rear. of the bridge-wall, connected at different levels with.

the steam and water chamber, the products of combustion surrounding the said pipes and then flowing through the flue in the vertical partition and surrounding the steam and water chamber, substantially as described.

3. The masonry inclosing the steam-generator, the former being provided with partitions at the front of its rear wall and below its top wall, and a steam and water chamber above-the first-mentioned partition,combined with a water-chamber lining the front wall of the furnace and constituting the front of the fire-chamber, a series of pipes from the lower portion there, of constituting bars of the grate, a rear wall for the ash pit supporting said pipes and bridge-wall supported thereon, a series of pipes extending from said water-chamber around the remaining three sides of the fire-chamber, and a series of pipes extending from said water-chamber over the bridge-wall and down at the rear thereof, and a water-inlet chamber connected with the lower end of the said pipes,

the water-chamber at the front of the fire-chamber and the water-inlet chamber being each connected with the steam and water chamber above the partition over the lire-chamber, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. I

WESTON T. EASTMAN. Witnesses:

F. CUTTER, B. J. NOYES. 

